A constant force is applied to an object that causes a certain displacement. If the angle between the force and the displacement is 135°, the work done by this force is
A) positive.
B) negative.
C) 0 J.
D) Cannot be determined without knowing the magnitude of the displacement.
E) Cannot be determined without knowing the magnitude of the applied force.
B
You might also like to view...
Which is a statement of Bernoulli's principle?
a. The pressure in a fluid decreases as its velocity decreases. b. The pressure in a fluid decreases as its temperature decreases. c. The pressure in a fluid decreases as its velocity increases. d. The pressure in a fluid decreases as its temperature increases. e. The speed of a fluid increases as its velocity increases.
In the apparatus shown in figure Q4.1b, the final value displayed by the voltmeter is proportional to 
A. The rate at which electrons emerge from the cathode. B. The average kinetic energy of the ejected electrons. C. The maximum kinetic energy of the ejected electrons. D. Both A and C.
Planet formation happens in newly formed solar systems over the course of about 100 million years
Indicate whether the statement is true or false
Intensity of Sound: You double your distance from a sound source that is radiating equally in all directions. What happens to the intensity of the sound? It reduces to
A. one-half its original value. B. one-fourth its original value. C. one-sixteenth its original value. D. None of these